While sailing on Lake Erie, captain Sherman spots the top of a lighthouse at a 15 degrees angle of elevation. A navigation chart
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Assuming ya mean
take derivitive
remember dy/dx e^x=e^x
also the chain rule
so
find where it equals 0
multiply both sides by e^x
divide both sides by 8
take ln of both sides
divide both sides by 9
x≈-1/5
f'(-1)<0
f'(0)>0
so it is increasing from x to infinity
the interval it is increasing on is
take derivitive
remember dy/dx e^x=e^x
also the chain rule
so
find where it equals 0
multiply both sides by e^x
divide both sides by 8
take ln of both sides
divide both sides by 9
x≈-1/5
f'(-1)<0
f'(0)>0
so it is increasing from x to infinity
the interval it is increasing on is